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Finding the Fourth Proportional to 70,662.48, 105,910.08 and 31,136.88

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Solution

The fourth proportional to 70,662.48, 105,910.08 and 31,136.88 is: 46,668.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,662.48 : 105,910.08 = 31,136.88 : x
  2. Step 2: Convert to fraction form
    70,662.48/105,910.08 = 31,136.88/x
  3. Step 3: Cross multiply
    70,662.48x = 105,910.08 × 31,136.88
  4. Step 4: Simplify right side
    70,662.48x = 3,297,709,451.75
  5. Step 5: Solve for x
    x = 3,297,709,451.75/70,662.48
  6. Step 6: Final answer
    x = 46,668.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.